Die Reduktion von Triphenylphosphan-Derivaten zu ihren Radikalanionen und zum Dibenzophosphol-Radikaldianion [1]
The Reduction of Triphenylphosphane Derivatives to their Radical Anions and to the Radical Dianion of Dibenzophosphole [1]
- Triphenylphosphane 1, its oxide 2 and sulfide 3 undergo one-electron reduction at a mercury cathode in DMF to yield the corresponding radical anions. ESE analysis of the paramagnetic species is facilitated by deuteration and suggests a pyramidal geometry of the radicals. Reduction with potassium metal in DME at low temperature yields also radical anions for 2 and 3. The phosphane 1, however, reacts under phenyl cleavage and potassiumphenyl-assisted ring closure to the dianion of 5H-dibenzophosphole 4. This radical 4· ⊖⊖ is also obtainod by alkali metal reduction of P-phenyldibenzophosphole o, and its spin distribution is compared to iso-.-π-electronic radicals containing CH, N, O, S, or Se links instead of the phosphorus atom.
Author: | Wolfgang KaimORCiDGND, Peter Hänel, Hans BockGND |
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URN: | urn:nbn:de:hebis:30:3-417132 |
DOI: | https://doi.org/10.1515/znb-1982-1104 |
ISSN: | 0175-0992 |
ISSN: | 0932-0776 |
Parent Title (German): | Zeitschrift für Naturforschung. Teil B, Chemie, Biochemie, Biophysik, Biologie |
Publisher: | De Gruyter |
Place of publication: | Berlin [u.a.] |
Document Type: | Article |
Language: | German |
Date of Publication (online): | 2016/10/24 |
Year of first Publication: | 1982 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Release Date: | 2016/10/24 |
Tag: | Dibenzophosphole; ESR Spectra; Radicals; Reduction; Triphenylphosphane |
Volume: | 37 |
Issue: | 11 |
Page Number: | 6 |
First Page: | 1382 |
Last Page: | 1387 |
Note: | © 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. (CC BY-NC-ND 3.0) |
HeBIS-PPN: | 400089505 |
Institutes: | Biochemie, Chemie und Pharmazie / Biochemie und Chemie |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - Namensnennung-Nicht kommerziell-Keine Bearbeitung 3.0 |